CN105159235B - Calcination process in rotary kiln synthesizes and coordinates control method and system - Google Patents
Calcination process in rotary kiln synthesizes and coordinates control method and system Download PDFInfo
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Abstract
The present invention relates to a kind of calcination process in rotary kiln of electrolytic aluminium carbon anode clinker comprehensive coordination control method and systems, belong to automatic control technology field, according to the NONLINEAR HEAT TRANSFER relationship of kliner coating temperature and kiln temperature, according to the hybrid modeling method of neural network and finite element, according to kliner coating temperature, temperature of kiln head, kiln end temperature, and kiln hood, the fabrication evaluations parameter such as kiln tail pressure, establish the Nonlinear Mapping relationship of kliner coating temperature and kiln temperature, to overcome the measurement of calcining belt temperature of the existing technology coarse, the calcining belt temperature that cannot really reflect, position, the problem of length data；Simultaneously on the basis of existing rotary kiln automatically controls, a kind of efficient, stable, real-time network communications scheme is added, to realize that information, operational administrative centralization and control are decentralized, product quality, the target of energy-saving, reliable and stable operation are improved to reach.
Description
Technical field
The present invention relates to automatic control technology fields, and in particular to during a kind of clinker burning of electrolytic aluminium carbon anode
The control method and system of rotary kiln.
Background technique
Carbon anode plays a very important role in aluminium cell production process, it is as conductor by iontophoresis
Electrolytic cell, and anode reaction process is participated in as anode electrolytic cell material.One ton of primary aluminum of every production will consume 500 kilograms or so
Carbon anode.Therefore, every quality index of carbon anode directly influences the normal production and yield, the matter of primary aluminum of electrolytic cell
Every technical-economic indexes such as amount, charcoal consumption and power consumption.
The important equipment of the clinker burning of carbon anode is carbon rotary kiln, the quality of rotary kiln running situation, direct shadow
Ring the yield and quality and energy consumption of charcoal element clinker.Its equipment has the characteristics that following several respects:
1) rotary kiln is one big inertia, large time delay, the control object there are time-varying parameter, even simplest time
Rotary kiln, motion process of the material in kiln are also nonlinearity, complexity, it is not only related to complicated heat transfer, Mass Transfer Apparatus
Reason, it is also closely related with the material characteristic of substance in kiln；
2) key process parameter is difficult to measurement accurately and timely, and the major part of kiln structure is in turn state, detection
Instrument is typically only capable to be mounted on the both ends of kiln, and key process parameter is caused to be difficult to measurement accurately and timely, thus we be difficult it is fixed
Thermal technology state in the description closing kiln of amount；The ambiguity of this parameter information leads to tradition so that the difficulty of modeling is very big
Control strategy be difficult to carry out；
3) control means are diversified, and coupling phenomenon is serious between each control means；Its control means include rotary kiln revolving speed,
The various controls means such as feeding coal, negative pressure, cyclone dust removal and two, tertiary air quantity, every kind of control means all may be used under certain operating condition
To have an impact positive and negative two kinds of trend of calcined by rotary kiln, to cause the steady point region of serious coupling, the work of Rotary Kiln Control
The problems such as narrow, it is difficult to find control means preferably fitting method.
External some national (such as U.S.) have been realized in the automatic control of carbon rotary kiln, but China is in this respect
Research and development falls behind relatively, consequently leads to level of the index lower than these countries of calcining production.The latter stage eighties, in work
The country of industry prosperity generally realizes the computer twin-stage Stabilization Control of calcination process in rotary kiln.Wherein with France
SATERAM company and R&D company of Switzerland are the burner and control system of representative, leader in the world calcining petroleum coke produce
Most advanced level, not only increase carbon block calcining homogenieity, reduce the specific energy consumption of calcining furnace, and promote environmental protection
Effect improves economic benefit.
The country initially enters the calcination process in rotary kiln computer control application stage from the beginning of the eighties.For a long time, scientific research
Technical staff has conducted extensive research work, mathematical model is combined with kiln temperature control, the method for introducing automatic control, more
Family's calcination process in rotary kiln has carried out computer control and has attempted.For example, Yunnan Aluminium Works, Guizhou Aluminum Factory, Baotou Aluminium Plant etc. are in difference
Computer automation control has been carried out to calcination process in rotary kiln in degree, has there is certain effect.But calcination process in rotary kiln meter
For calculation machine controlled level compared with industrially developed country, starting evening, gap are bigger, and develop very uneven.To being at present
Only, quite a few domestic calcination process in rotary kiln is still manually operated, in addition technology falls behind, working environment is severe, if
It is standby outmoded, it causes rotary kiln to be chronically at uneconomical state, seriously affects calcined coke quality.Meanwhile labor productivity is low, energy consumption
Greatly, environmental pollution is serious.These gaps seriously threaten the survival and development to China's Aluminum, largely reduced it and participate in international city
The ability of field competition.
Existing carbon rotary kiln calcining control technology is primarily present following defect:
1) petroleum coke raw material calcination process temperature in rotary kiln can achieve 1200~1300 DEG C, and the refinement of charcoal element lattice causes
Densification, to meet calcined coke real density, specific resistance index；But the measurement of domestic calcining belt temperature is coarse, cannot really reflect
Calcining belt temperature, position, length data, burning zone formed control entirely lean on operator's experience manual adjustment, automatically control still
It is blank；
2) most of rotary kiln structures are divided into process automation grade and two layers of Basic automation level, but in mistake
In process automation control process, since site environment influences the complexity with rotary kiln own system, so general control systems
In control means be mostly the operation of single amount；But the operation of unitary variant is so that the coupling of the variable and other control variables is closed
System is difficult to exclude, and system is difficult to run to by way of optimization on more excellent stable point；
3) third level Multimode Control and fault diagnosis system is added, changes the Two-level Control communication topology knot of original system
Structure is not carried out DCS (Distributed Control System), and third level Multimode Control and fault diagnosis system can not be with following two-stages
System carries out valid data communication, to cannot achieve the Automated library system monitoring control of rotary calciner technique overall process.
Summary of the invention
The present invention provides one kind for the detection of current aluminum electrolysis anode carbon element calcined by rotary kiln and automatic control system status
Calcination process in rotary kiln synthesizes and coordinates control method and system, to overcome the measurement of calcining belt temperature of the existing technology thick
It is rough, the problem of the calcining belt temperature that cannot really reflect, position, length data；Simultaneously from rotary kiln controlling of production process angle
It sets out, invents a kind of Distributed Control System of aluminum electrolysis anode carbon element rotary kiln, by computer, expert system, optimization
The technologies such as technology, data analysis theories, data communication organically blend；On the basis of existing rotary kiln automatically controls, add
Enter efficient, stable, the real-time network communications scheme of one kind and establishes uniform data on the basis of not destroying original communication system
Library realizes that new system is interacted with the effective information of original system, and assists to realize that one, two, three distribution is collecting and distributing by communication system
The calcination process in rotary kiln of control system synthesizes and coordinates control, overcomes in centralized control system to controller processing capacity and can
By the demanding defect of property, control and management function are separated, to realize that information, operational administrative centralization and control are decentralized,
Product quality, the target of energy-saving, reliable and stable operation are improved to reach.In view of system equipment increases, adjusts and rises
Grade, has fully considered the scalability of system soft and hardware resource in system configuration, not influence existing equipment fortune backward
In the case where row, system can be expanded to upgrading into full factory's computer automatic control system comprising more rotary kilns.
In order to achieve the above object, the technical scheme adopted by the invention is that: a kind of calcination process in rotary kiln comprehensive coordination control
Method processed comprising:
1) according to the NONLINEAR HEAT TRANSFER relationship of kliner coating temperature and kiln temperature, according to BP neural network and finite element modelling
Hybrid modeling method establishes the Nonlinear Mapping relationship of kiln temperature Yu kliner coating temperature；
2) real-time continuous data are carried out using kliner coating temperature of the infrared kiln body scanning device to rotary kiln to acquire, and according to
The Nonlinear Mapping relationship of kiln temperature and kliner coating temperature, constructs the temperature curve of kiln temperature, is carried out using least square method
The data of kiln temperature are fitted, and establish standard according to burning zone, calculate calorific value information in burning zone and kiln；
3) according to calcining information and the direct acquisition parameter of site technique, various control is adjusted according to automatic control program
Means form burning zone, complete calcination process in rotary kiln comprehensive coordination control；
Wherein, burning zone information calculated includes burning zone mean temperature, length, position etc.；Used a variety of controls
Means processed include Secondary Air, tertiary air, kiln revolving speed, air-introduced machine, feeding coal etc..
Preferably, the Nonlinear Mapping relationship of the kiln temperature and kliner coating temperature method for building up the following steps are included:
1) it establishes heat radiation pyrometer history data set: utilizing the 2-3 menology obtained in calcination process in rotary kiln database
The historical data for levying kiln temperature and kliner coating temperature, wherein excluding kliner coating temperature change caused by Changes in weather, such as snows,
It rains and causes temperature decrease problem；
2) it establishes rotary kiln heat transfer coefficient model: on the basis of rotary kiln heat-transfer mechanism, obtaining rotary kiln inner wall and forge
The basic composition of heat exchange models between burning feed particles；Further according to the composition of kiln inner lining material, the temperature gradient in kiln, building are studied
The nonlinear temperature relationship of kiln inner wall and kliner coating in normal weather, the i.e. number of rotary kiln heat transfer system essence dynamic characteristic
Learn model；
3) special to rotary kiln heat transfer system essence dynamic using BP neural network and the hybrid modeling method of finite element modelling
Property and thermal stress carry out mathematical modeling.
Preferably, it is described using BP neural network and the hybrid modeling method of finite element modelling to rotary kiln heat transfer system sheet
The method that matter dynamic characteristic and thermal stress carry out mathematical modeling, the specific steps are as follows:
1) structure for determining BP neural network is three layers；Wherein, the neuron number of input layer, which is equal to, influences kiln temperature
Factor number；Hidden layer neuron number can be determined according to different training sample sets；Only one nerve of output layer
Member represents calcining belt temperature in the kiln of output；Wherein, the factor for influencing kiln temperature includes: kliner coating temperature Tp, kiln hood temperature
Spend Tt, kiln end temperature Tw, sedimentation room temperature Tc, kiln hood pressure Pt, kiln tail pressure Pw, sedimentation chamber pressure Pc, kiln revolving speed Sy；
2) initial rotary kiln technology parameter is defined, the calcination process of rotary kiln is imitated according to the calculation process of finite element
Very；
3) gained calcining belt temperature is calculated to finite element model to be compared with measured value, it is defeated when meeting error condition
The prediction output that calcining belt temperature is emulated as this out；
If 4) error condition does not meet, key factor value that is FEM calculation is resulting, influencing calcining belt temperature is made
For trained neural network input, calcining belt temperature error amount is exported by neural computing；
5) it simultaneously using the deformation temperature of rotary kiln, deformation extent, rate of deformation as the independent variable of resistance of deformation formula, asks
The resistance of deformation value of kiln body out；
6) according to the resistance of deformation value of the output of neural network and calculating, re-optimization adjusts the initial ginseng of finite element model
Number carries out new round calculating, until meeting the condition of convergence.
Preferably, the initial rotary kiln technology parameter includes: simplified length, diameter, kiln inner lining material coefficient, kliner coating material
Expect coefficient etc..
In finite element modeling process, although being handled Field Production Data, and extract for finite element
The actual physics parameter of modeling, but nonlinear characteristic strong between data is difficult to hold, that is, causes finite element modeling inclined
The basic reason of difference.And the good nonlinear characteristic of neural network, then effectively help the dynamic of Parameters of Finite Element to adjust.
Realize object above, the present invention also provides a kind of calcination process in rotary kiln to synthesize and coordinate control system, which employs
Multisystem, multi-functional, multi-communication protocol mixed communication Integrated Solution construct rotary kiln three-stage control system with auxiliary, realize
Detection, effective transmitting of control signal and feedback, complete three-stage control system and coordinate.The mixed communication Integrated Solution uses
The network communication configuration of control and detection layers, monitoring layer and decision-making level, mixed communication Integrated Solution are specific as follows:
1) with detection layers, PLC controller controls and real-time detection kiln operation parameter, and transmits the parameter for control
Give Factory Talk View host computer picture；Operator is manually adjusted according to the display interface data of host computer；Together
When Siemens PC-BOX carry out remaining oxygen Data Detection and kiln hood, kiln tail pressure and temperature real-time control；
2) opc server 1 is established in kliner coating temperature scanning instrument industrial personal computer, CT infrared scanner obtains kliner coating Temperature Distribution
Data, and be transmitted on opc server 1, while being added in the WINCC monitoring system of the Distributed Control System of decision-making level
OPC driving, connection opc server 1 access kliner coating temperature profile data；
3) according to the distributed data of kliner coating temperature, using BP neural network and finite element modelling hybrid modeling method in kiln
The real-time reasoning and calculation of temperature is completed the distribution curve of kiln temperature, and is intended in real time using least square method acquisition data
Close, according to burning zone lay down a regulation calculating and filing calcining information；
4) it is soft that RS-link communication is configured on the basis of the Distributed Control System of decision-making level SIMATIC PCS7
Part scans PLC controller, and establishes work information opc server 2 in Distributed Control System；
5) control information opc server 3 is established in Distributed Control System using AIMATIC NET, simultaneously will
Expert control system is also integrated into Distributed Control System, and expert system calls fuzzy-clips computing engines to carry out
Fuzzy reasoning, output control information are stored on opc server 3；
6) using Link Master-OPC bridge connection work information opc server 2 and control information opc server 3；
7) engineer station of centrally located control room (CCR) is completed logical by Industrial Ethernet with each work on the spot station
News connection, realizes the communication system of dual-ring network, by the redundancy configuration to communication system, realizes the redundancy function of whole network system
Energy；Each work on the spot station is connect with each slave station again.
Wherein, the kiln operation parameter of PLC controller control and real-time detection includes: feeding coal, kiln revolving speed,
Two, rotation speed of fan three times, air-introduced machine revolving speed, kiln hood, kiln tail, expansion chamber temperature and pressure etc.；The work information opc server
2 be the pressure and temperature work information opc server 2 of kiln hood, kiln tail, expansion chamber；The control information exported includes kiln hood, kiln
Tail pressure and temperature.
The present invention analyses in depth according to the complicated variety of field working conditions and has extracted a whole set of calcination process in rotary kiln
Control rule, and by visual software, corresponding live rule can be modified and be added.By accumulating for a long time
It is tired, optimizing can be carried out to work on the spot point very well.The working strength for mitigating field personnel significantly simultaneously, makes systematic knowledge
Update is more easy, and the transparency, interactivity are stronger.
Control method and system of the present invention overcome carbon rotary kiln certainly dedicated for the carbon rotary kiln of aluminum electrolysis industry
Dynamicization degree is not high, taking human as influence factor be main control means the shortcomings that, can instruct rapidly site operation personnel's
Technical specification and operating instruction greatly improve the production capacity of carbon anode, guarantee product quality, more can guarantee that very well rotary kiln is set
Standby stability, safety.
Detailed description of the invention
Fig. 1 is the hybrid modeling flow chart of BP neural network and finite element analysis；
Fig. 2 is the network communication configuration figure of carbon rotary kiln；
Fig. 3 is the tertiary structure figure of control system；
Fig. 4 is three-level system interface setting figure；
Fig. 5 is intelligent decision system and optimal control tabular drawing；
Fig. 6 is to be added and the kiln hood that automatic control is not added, kiln tail, expansion chamber in rotary kiln actual mechanical process
Temperature and negative pressure curve.
Specific embodiment
As shown in Figure 1, using BP neural network and the hybrid modeling method of finite element modelling to rotary kiln heat transfer system sheet
The method that matter dynamic characteristic and thermal stress carry out mathematical modeling, specific as follows:
1) structure for determining BP neural network is three layers；Wherein, the neuron number of input layer, which is equal to, influences kiln temperature
Number, such as: including kliner coating temperature Tp, temperature of kiln head Tt, kiln end temperature Tw, sedimentation room temperature Tc, kiln hood pressure Pt, kiln tail pressure
Power Pw, sedimentation chamber pressure Pc, kiln revolving speed SyEtc. parameters；Hidden layer neuron number can be determined according to different training sample sets；
Only one neuron of output layer, represents calcining belt temperature in the kiln of output；
2) initial rotary kiln technology parameter is defined, such as: barrel lenght, diameter, kiln inner lining material coefficient, kliner coating material system
Number etc., emulates the calcination process of rotary kiln according to the calculation process of finite element；
3) gained calcining belt temperature is calculated to finite element model to be compared with measured value, it is defeated when meeting error condition
The prediction output that calcining belt temperature is emulated as this out；
If 4) error condition does not meet, key factor value that is FEM calculation is resulting, influencing calcining belt temperature is made
For trained neural network input, calcining belt temperature error amount is exported by neural computing；
5) it simultaneously using the deformation temperature of rotary kiln, deformation extent, rate of deformation as the independent variable of resistance of deformation formula, asks
The resistance of deformation value of kiln body out；
6) then according to the resistance of deformation value of output and the calculating of neural network, re-optimization adjusts the first of finite element model
Beginning parameter carries out new round calculating, until meeting the condition of convergence.
As shown in Fig. 2, calcination process in rotary kiln comprehensive coordination control system uses multisystem, multi-functional, more communication protocols
The mixed communication Integrated Solution of view constructs rotary kiln three-stage control system with auxiliary, realizes effective transmitting of detection, control signal
And feedback, it completes three-stage control system and coordinates.It includes control and detection layers, monitoring layer and decision that mixed communication Integrated Solution, which uses,
The network communication configuration of layer, mixed communication Integrated Solution are specific as follows:
1) with detection layers, the AB SLC500 series of PLC controller of Rockwell Corporation controls feeding coal for control, and kiln turns
Speed, two, rotation speed of fan, the parameters such as air-introduced machine revolving speed, and real-time detection feeding coal three times, kiln hood, kiln tail, sedimentation room temperature and negative
Pressure, the technological parameters such as kiln revolving speed, and Factory Talk View host computer picture is transmitted data to by Ethernet；By operating
Work artificial observation host computer interface is manually adjusted according to the display interface data of host computer, to maintain stable conditions in kiln；
Siemens PC-BOX carries out the real-time control of remaining oxygen Data Detection and kiln hood, kiln tail negative pressure and temperature simultaneously；
2) opc server 1 is established in kliner coating temperature scanning instrument industrial personal computer, kliner coating temperature CT infrared scanner obtains revolution
The entire kliner coating Temperature Distribution detailed data of kiln transmits the data of acquisition by the channel OPC of infrared scanner monitoring software
OPC driving is added onto opc server 1, while in the WINCC monitoring system of the Distributed Control System of decision-making level, even
It connects opc server 1 and accesses kiln body temperature profile data；
3) according to the distributed data of the kliner coating temperature of acquisition, BP neural network and finite element modelling hybrid modeling method are utilized
To the real-time reasoning and calculation of kiln temperature, the distribution curve of kiln temperature is completed, and acquisition data are carried out using least square method
Real-time fitting, according to burning zone lay down a regulation calculating and file calcining belt temperature, position, length information；
4) it is soft that RS-link communication is configured on the basis of the Distributed Control System of decision-making level SIMATIC PCS7
Part, scans the AB PLC device of rotary kiln Rockwell control system, and builds in the Distributed Control System of decision-making level
Shaft kiln head, kiln tail, expansion chamber pressure and temperature work information opc server 2；
5) control information OPC is established in the Distributed Control System of SIMATIC PCS7 using SIMATIC NET
Server 3, while expert control system being also integrated into Distributed Control System, expert system calls fuzzy-
Clips computing engines carry out fuzzy reasoning, and the control information such as output kiln hood, kiln tail pressure and temperature is stored in opc server 3
On；
6) using Link Master-OPC bridge connection work information opc server 2 and control information opc server 3 into
Row data transmission and reception realize that three-stage control system coordinates the full-automation of rotary kiln；
7) engineer station of centrally located control room (CCR) is completed communication with each scene station and is connected by Industrial Ethernet
It connects, realizes the communication system of dual-ring network, by the redundancy configuration to system, realize the redundancy feature of whole network system；System
Each work on the spot station is connect further through optical fiber or DP with each slave station.
The structure of three-stage control system is as shown in figure 3, every grade of the three-stage control system concrete function controlled are as follows:
Level-one rotary kiln detects subsystem, for detecting to the parameter in rotary kiln combustion process, and by the ginseng
Number is transmitted to Two-stage control subsystem and three-level diagnosis decision-making subsystem；
Two-stage control subsystem, for according to level-one rotary kiln detect subsystem transmission come the parameter and three-level examine
The feeding coal of the rotary kiln that disconnected decision-making subsystem transmission comes, secondary air fan, three times after the optimization of blower, air-introduced machine and kiln revolving speed
Control amount controls rotary kiln；
Three-level diagnose decision-making subsystem, for according to level-one rotary kiln detect subsystem transmission come the parameter returned
The feeding coal of rotary kiln, blower, the control amount of air-introduced machine and kiln revolving speed and optimizes control amount secondary air fan three times, and will
Control amount after optimization is transmitted to Two-stage control subsystem.
Three-stage control system mainly completes identification and the intelligent decision of burning zone unusual service condition.According to level-one detection device
Historical data is constructed for integrating various control variable (kiln hood, kiln end temperature) and various control means (Secondary Air, three times
Wind, kiln tail negative pressure) come the three-stage control system that is advanced optimized to original control amount (calcining belt temperature, length, position).
Changing rule of the system due to combining each control variable, using multiple control variables of rotary kiln by the more of rotary kiln
A process parameter control is on optimum controlling point, and while guaranteeing quality, the yield of calcination product, that improves rotary kiln running can
By property, safety and validity.
Fig. 4 is the set interface of three-level system, can complete the detection of real time data, and fuzzy reasoning is true, rule inputs,
And the output of the reasoning results (performance analysis, operational means adjustment)；Engineer's option can complete above functions, and by operating condition
In the content and operational means Adjusted Option final output to the main interface of control system of analysis；
Fig. 5 is intelligent decision system and optimal control tabular drawing, according to the design parameter of different feeding coal operating conditions, by big
The analysis for measuring historical data, can obtain the optimal setting of Rotary Kiln Control variable, according to the parameter setting of optimal setting,
Realize recurrence of the rotary kiln in certain unusual service condition to nominal situation.The final three-level intelligent control scheme for realizing rotary kiln, subtracts
The workload and operating pressure of light site operation personnel, increases economic efficiency.
The following table 1 is the analytical table of operational means and product quality, by June, 2014 to nearly 2 months of in July, 2014
Data statistics can be seen that the rotary kiln charcoal element sun using calcination process in rotary kiln of the present invention comprehensive coordination control method and system
Pole clinker burning technology substantially can satisfy performance indexes, reach following control target:
(1) burning zone start position calcines strip length 15-20m, 230 DEG C of kliner coating external temperature < apart from kiln tail 13m or so
When, calcining belt temperature is not less than 1250 DEG C, and burning zone is between two, tertiary air；
(2) kiln hood requires to guarantee negative pressure state, it is desirable that -5Pa is between 10Pa；
(3) temperature of kiln head is not more than 950 DEG C；
(4) kiln end temperature is not more than 1050 DEG C；
(5) kiln tail negative pressure is maintained between -25Pa to -50Pa；
(6) sedimentation room temperature is not more than 1250 DEG C；
(7) tertiary air revolving speed is no more than 2000rpm；
(8) two, the adjustment of tertiary air rotation speed of fan cannot be too fast too quickly, two, tertiary air each adjusted value when generally adjusting
To be adjusted again after stablizing no more than 50-100rpm；
(9) inventory is not less than 12t during normal production；
It (10) is to prevent kiln hood from returning fire and bucket pressure-raising material, it is necessary to pay close attention to small kiln exhaust gas and dump temperature, it is desirable that exhaust
Temperature is not more than 220 DEG C, 50-120 DEG C of dump temperature；
(11) during normal production, rotary kiln revolving speed: 0.6-1.2rpm.
As shown in fig. 6, being added and in rotary kiln actual mechanical process that the kiln hood automatically controlled, kiln tail, sedimentation is not added
The temperature and negative pressure curve of room.As can be seen from the figure either negative pressure or temperature curve are added after automatically controlling, all more
Steadily, there is not larger fluctuation, so finding out that automatic control can effectively overcome the disturbance in kiln, thus for good quality
Calcined coke generation creates advantage.
Calcination process in rotary kiln comprehensive coordination control method and system provided by the invention, overcome of the existing technology
The problem of measurement of calcining belt temperature is coarse, the calcining belt temperature that cannot really reflect, position, length data；It will calculate simultaneously
The technologies such as machine, expert system, optimisation technique, data analysis theories, data communication organically blend, and are not destroying original communication
On the basis of system, establishes unified database and realize that new system is interacted with the effective information of original system, and assisted by communication system
The calcination process in rotary kiln comprehensive coordination control for realizing one, two, three Distributed Control System is helped, centerized fusion is overcome
The defect high to controller processing capacity and reliability requirement in system separates control and management function, to realize information, behaviour
Make management centralization and control is decentralized, improves product quality, the target of energy-saving, reliable and stable operation to reach.
Although the present invention is specifically illustrated in and described referring to exemplary embodiment of the present invention, this field is general
It is logical the skilled person will understand that, not departing from the spirit and scope of the present invention as defined by claim and their equivalent
In the case of, it can be in form and details can be made herein various changes.Should only in the sense that descriptive rather than for
The purpose of limitation considers embodiment.Therefore, the scope of the present invention is not limited by a specific embodiment of the invention,
It is defined by the claims, all differences within the scope of this are to be interpreted as being included in the invention.
Claims (10)
1. a kind of calcination process in rotary kiln synthesizes and coordinates control method, which is characterized in that the described method includes:
1) according to the NONLINEAR HEAT TRANSFER relationship of kliner coating temperature and kiln temperature, according to the mixing of BP neural network and finite element modelling
Modeling method establishes the Nonlinear Mapping relationship of kiln temperature Yu kliner coating temperature；
2) it carries out real-time continuous data using kliner coating temperature of the infrared kiln body scanning device to rotary kiln to acquire, and according in kiln
The Nonlinear Mapping relationship of temperature and kliner coating temperature, constructs the temperature curve of kiln temperature, is carried out in kiln using least square method
The data of temperature are fitted, and establish standard according to burning zone, calculate calorific value information in burning zone and kiln；
3) according to calcining information and the direct acquisition parameter of site technique, various control means are adjusted according to automatic control program
Burning zone is formed, calcination process in rotary kiln comprehensive coordination control is completed；
The method for building up of the Nonlinear Mapping relationship of the kiln temperature and kliner coating temperature the following steps are included:
1) it establishes heat radiation pyrometer history data set: utilizing the 2-3 obtained in calcination process in rotary kiln database month characterization kilns
The historical data of interior temperature and kliner coating temperature, wherein excluding kliner coating temperature change caused by Changes in weather；
2) it establishes rotary kiln heat transfer coefficient model: on the basis of rotary kiln heat-transfer mechanism, obtaining rotary kiln inner wall and calcining is former
The basic composition of heat exchange models between material particle；Further according to the composition of kiln inner lining material, the temperature gradient in kiln is studied, is constructed in kiln
The nonlinear temperature relationship of wall and kliner coating in normal weather, the i.e. mathematical modulo of rotary kiln heat transfer system essence dynamic characteristic
Type；
3) using the hybrid modeling method of BP neural network and finite element modelling to rotary kiln heat transfer system essence dynamic characteristic and
Thermal stress carries out mathematical modeling.
2. calcination process in rotary kiln according to claim 1 synthesizes and coordinates control method, which is characterized in that described to use BP
Neural network and the hybrid modeling method of finite element modelling count rotary kiln heat transfer system essence dynamic characteristic and thermal stress
The method for learning modeling, the specific steps are as follows:
1) structure for determining BP neural network is three layers；Wherein, the neuron number of input layer be equal to influence kiln temperature because
The number of element；Hidden layer neuron number can be determined according to different training sample sets；Only one neuron of output layer, generation
Calcining belt temperature in the kiln of table output；
2) initial rotary kiln technology parameter is defined, the calcination process of rotary kiln is emulated according to the calculation process of finite element；
3) it calculates gained calcining belt temperature to finite element model to be compared with measured value, when meeting error condition, output is forged
Burn the prediction output emulated with temperature as this；
If 4) error condition does not meet, key factor value that is FEM calculation is resulting, influencing calcining belt temperature is as
Trained neural network input, exports calcining belt temperature error amount by neural computing；
5) simultaneously using the deformation temperature of rotary kiln, deformation extent, rate of deformation as the independent variable of resistance of deformation formula, kiln is found out
The resistance of deformation value of body；
6) according to the resistance of deformation value of the output of neural network and calculating, re-optimization adjusts the initial parameter of finite element model,
New round calculating is carried out, until meeting the condition of convergence.
3. calcination process in rotary kiln according to claim 2 synthesizes and coordinates control method, which is characterized in that the influence kiln
The factor of interior temperature includes: kliner coating temperature Tp, temperature of kiln head Tt, kiln end temperature Tw, sedimentation room temperature Tc, kiln hood pressure Pt, kiln
Tail pressure Pw, sedimentation chamber pressure Pc, kiln revolving speed Sy.
4. calcination process in rotary kiln according to claim 2 synthesizes and coordinates control method, which is characterized in that described initial time
Kiln rotaring process parameter includes: barrel lenght, diameter, kiln inner lining material coefficient, kliner coating material coefficient.
5. calcination process in rotary kiln according to claim 1 synthesizes and coordinates control method, which is characterized in that letter calculated
Breath includes the calorific value in burning zone mean temperature, length, position and kiln.
6. calcination process in rotary kiln according to claim 1 synthesizes and coordinates control method, which is characterized in that used more
Kind control means include Secondary Air, tertiary air, kiln revolving speed, air-introduced machine, feeding coal.
7. a kind of calcination process in rotary kiln synthesizes and coordinates control system, which is characterized in that using multisystem, multi-functional, multi-pass letter
The mixed communication Integrated Solution of agreement assists building, mixed communication Integrated Solution uses include control with detection layers, monitoring layer and
The network communication configuration of decision-making level, mixed communication Integrated Solution are specific as follows:
1) control with detection layers in, PLC controller control and real-time detection kiln operation parameter, and transmit the parameter to
FactoryTalkView host computer picture；Operator is manually adjusted according to the display interface data of host computer；West simultaneously
The sub- PC-BOX of door carries out the real-time control of remaining oxygen Data Detection and kiln hood, kiln tail pressure and temperature；
2) opc server 1 is established in kliner coating temperature scanning instrument industrial personal computer, CT infrared scanner obtains kliner coating Temperature Distribution number
According to, and be transmitted on opc server 1, while being added in the WINCC monitoring system of the Distributed Control System of decision-making level
OPC driving, connection opc server 1 access kliner coating temperature profile data；
3) according to the distributed data of kliner coating temperature, using BP neural network and finite element modelling hybrid modeling method to kiln temperature
Real-time reasoning and calculation completes the distribution curve of kiln temperature, and carries out real-time fitting to acquisition data using least square method, presses
According to burning zone lay down a regulation calculating and filing calcining information；
4) RS-link communication software, scanning are configured on the basis of the Distributed Control System of decision-making level SIMATICPCS7
PLC controller, and work information opc server 2 is established in Distributed Control System；
5) control information opc server 3 is established in Distributed Control System using SIMATICNET, while expert being controlled
System processed is also integrated into Distributed Control System, and expert system calls fuzzy-clips computing engines to carry out fuzzy push away
Reason, output control information are stored on opc server 3；
6) using LinkMaster-OPC bridge connection work information opc server 2 and control information opc server 3；
7) engineer station of centrally located control room (CCR) is completed communication with each work on the spot station and is connected by Industrial Ethernet
It connects, realizes the communication system of dual-ring network, by the redundancy configuration to communication system, realize the redundancy feature of whole network system；
Each work on the spot station is connect with each slave station again.
8. calcination process in rotary kiln according to claim 7 synthesizes and coordinates control system, which is characterized in that the PLC control
The kiln operation parameter of device control processed and real-time detection includes: feeding coal, kiln revolving speed, and two, rotation speed of fan, air-introduced machine turn three times
Speed, kiln hood, kiln tail, expansion chamber temperature and pressure.
9. calcination process in rotary kiln according to claim 7 synthesizes and coordinates control system, which is characterized in that the operating condition letter
Breath opc server 2 is the pressure and temperature work information opc server 2 of kiln hood, kiln tail, expansion chamber.
10. calcination process in rotary kiln according to claim 7 synthesizes and coordinates control system, which is characterized in that exported
Controlling information includes kiln hood, kiln tail pressure and temperature.
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| CN107290960A (en) * | 2017-06-19 | 2017-10-24 | 江西洪都航空工业集团有限责任公司 | A kind of intelligence multiple control system of large-scale intelligent grass-removing robot |
| CN107270303B (en) * | 2017-06-28 | 2018-12-18 | 光大环境科技（中国）有限公司 | A kind of rotary kiln method for controlling rotation and its control system |
| CN108334708B (en) * | 2018-02-10 | 2022-03-01 | 湖南城市学院 | Temperature monitoring method for single-storey factory building |
| CN108647481A (en) * | 2018-08-14 | 2018-10-12 | 华东理工大学 | A kind of rotary kiln burning zone temperature flexible measurement method |
| CN109358579B (en) * | 2018-10-18 | 2020-06-23 | 浙江大学 | Full-process coordination control system and method for production process of acetylene by plasma pyrolysis of coal |
| CN110716528A (en) * | 2019-09-17 | 2020-01-21 | 湖州职业技术学院 | Large hydraulic machine remote fault diagnosis method and device based on expert system |
| CN110738434B (en) * | 2019-12-18 | 2022-05-13 | 贵阳铝镁设计研究院有限公司 | Quality tracing management method for whole production process of carbon anode for aluminum |
| CN111950191B (en) * | 2020-07-07 | 2021-05-11 | 湖南大学 | Rotary kiln sintering temperature prediction method based on hybrid deep neural network |
| CN111914461A (en) * | 2020-09-08 | 2020-11-10 | 北京航空航天大学 | Intelligent assessment method for one-dimensional cold efficiency of turbine guide vane |
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